The site manager is also removing the starter relay fuse every night to stop the engine being started

Matt, of Birmingham, got his car back after the robbers left it in a quiet street, but as spates of keyless car thefts are reported across the country he's taking some extreme precautions against cyber thieves.

He said: "I put a big chain over the steering wheel and over the horn so if there's any movement it will sound."

On top of this site manager Matt is removing the starter relay fuse - a key component of the starting mechanism - every night.

ADAC - the German AA - tricked the keyless sensor technology into thinking that the vehicle's owner is nearby with the fob

Tests by the ADAC researchers say the the device used for the tests costs just £80.

A spokesman for the biggest motoring club in Europe said “The radio connection between keys and car can easily be extended over 100 metres, regardless of whether the original key is, for example, at home or in the pocket of the owner.”

Research centre Thatcham has offered safety advice including turning fobs off if they have the capability or purchasing a metal lined sleeve to keep keys in.

The centre also recommended using tracking devices as a visible deterrent.

Ford have said they take vehicle security very seriously and invest in security solutions to deter theft.

A spokesman said: “We are constantly learning more about the latest techniques thieves are using to gain access to vehicles, and whether there are additional enhancements we can make in our vehicles in the face of constant criminal activity to beat them.”

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